[RFC][PATCH] ring-buffer: Replace this_cpu_{read,write} with this_cpu_ptr()

Steven Rostedt rostedt at goodmis.org
Tue Mar 17 07:11:13 PDT 2015


On Tue, 17 Mar 2015 08:13:41 -0400
Steven Rostedt <rostedt at goodmis.org> wrote:

> > > I may go and remove all this_cpu_read,write() calls from my code
> > > because of this.
> > 
> > You could do that with __this_cpo_* but not this_cpu_*(). Doing
> > it to this_cpu_* would make the operations no longer per cpu atomic. If
> > they do not need per cpu atomicity then you could have used __this_cpu_*
> > instead. And  __this_cpu_* do not disable preemption or interrupts.
> 
> I do not need it to be atomic.

I test this out with __this_cpu_* versions and see if that solves it
too. If it does, I'll use that version instead.

Thanks,

-- Steve



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